Summary of Significant Accounting Policies Change in Accounting Estimate (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Write-down of inventory	$ 10,380,000	$ 1,167,000	$ 582,000
Losses on inventory purchase commitments	2,455,000	0	0
Decrease (Increase) In Operating Income (Loss) Including Poriton Attributable To Noncontrolling Interest	12,800,000
Decrease (Increase) In Operating Income (Loss) Attributable To Parent	$ 9,700,000
Earnings Per Share Basic And Diluted Increse (Decrease)	$ 1.01